what Khalid the tiger is doing, is called Daw 'ah , inviting ppl to Islam , giving advice or even a reminder for some ppl ( Muslims) nothing wrong with that. Masha allah that ! that is the way it should be . Why ppl here always take it personal or have to be negative about it , take it or leave it . It was nothing personal ,like we Muslims say the reminder benefits the believer.
Jazaka allahu khairan Khalid